Lamp construction



Aug. 13, 1929. s, w HYATT 1,724,201

LAMP CONSTRUCTION Filed May 19, 1928 Fla. 1

lo Z4 Z5 INVENTOR.

SflHl/EL W. HYHTZ Patented Aug. 13, 1929.

UNETE filATiiS PATENT OFFICE.

FEA'MULEL W. I-EYATI, OF CUNNERSVILLE, INDIANA, ASSIGNOB. TC) INDIANA. LAMP COHTORATION, F CONNERSVILLE, INDIANA.

LAM]? CONSTRUCTION.

Application filed May 19, 1928. Serial No. 2?9,048.

This application relates to the construe tion of an automobile lamp, and. particultill with respect to the securing of the door closure upon the lamp casing.

In the manufacture of automobile lamps, there has been diiiiculty in providing a suitable structure for removably securing and locking; the door closure or lens and rim to the casing so as to permit ready access to the interior thereof while at the same time effectively sealing the interior i. m the ele ments and obtaining a construction which will be simple and economical to produce.

It is the object of this invention to obtain the desired results by means of an internal clamping ring contained within the door clos re or rim and adapted to clamp, about the periphery oi the casing for removahly securing the closure and easingtogether while t the same time holding the le: 3 in position for eili'ectively sealing;- the interior of the lamp and obtain the clamping by a latch pivotally mounted and positioned eX- ternally of the closure for effecting a cam action with respect to the split ends of the clamping ring; for moving it in and out of clamping engagement.

The full nature of the invention will be more clearly understood from the accompany drawings and the following description and claims.

Fig}; 1 is a side elevation of an automobile lampshowing a forward portion thercoif in central vertical section with the door closure chunped thereon. Fig. 2 shows a section of the door rim and clamping ring with. the latch moved. to open position. 3 is the same as Fig. 2 showing the latch. moved to closed position. Fig. 4.- is a perspective view of one ot the lens securing clips. Fig. 5 a development of the latch illustrating the cam slots formed therein.

In the drawings there is shown a lamp casing or housing provided with the usual supporting bracket 11 and containing a reflector l2. Said casing is provided with an inwardly extendino flange 13 about the forward edge thereoi: to which the reflector is removably secured by the screws 1%. Surrounding the open face of the casing adjacent thei'lange 13 there is an annular and inwardly formed groove 15.

The closure for the casing comprises the door rim 16 within which is mounted. the lens 17. Said rim is provided about its rear edge with an. inwardly extending flange 18 so that when it is mounted in place is illustrated, said rim extends over the recess of the casing and the flange 18 cngza about the outer surface thereof. Thel is held within the rim by means out a flat fibrous cushioning and sealing ring 19 by means of the springclips 20. Said clips are positioned within the door rim so to exert a. spring pressure between the flange 18 thereof and the sealing ring 19 for resiliently pressing the lens against the abutting edge of the door rim.

The spring); clamping ring 21 is mounted within the door rim so as to extend about and adjacent the inner periphery thereof.-

Said clamping; ring is so formed as to maintain a snug fit between the flange 18 and the sealing ring 19 so as to resiliently bear z'igrainst said sealing ring throughout the entire lei Li1 thereof. Inasmuchas there are provided only a few of the clips 20, the split clamping ring; 21 further acts to exert a spring sealing pressure against the sealing: ring 19 for holding the lens in position. Said ring is also formed to seat about the annular rec l5 and engage therein.

At the split ends of said ring there are secured a pair of oppositely disposed projecting pins 22 which extend through an eiongated slot 23 formed in the door rim 16. Said pins have outwardly projectino' ends and extend through the cam )h formed in the latch member 25, said latch member being; formed about the outwardly projecting free ends said pins.

In operation, the latch is swung about the ends oi the pins 22 to the position shown in Fig. 2. This action forces said pins apart which spreads the split clamping ring 21. This enables the door rim to be readily mounted in closing; position over the open end of the casing 10. When so mounted, the clamping. ring seats in the annular recess 15. Thereupon, the latch 25 is swung about its pivotal mounting on the pins to a position shown in Figs. 1 and The action of the cam slots upon the pins draws them together which acts to draw the split clamping ring tightly about the casing seated in the groove. Thus, the door rim in which the split clamping ring is mounted is firmly secured to the casing and the excess tension exerted upon the split ing causes the outward spreading to pivot and swing of that portion thereof which engages the sealing ring 19 so as to yieldingly force said ring and lens in sealing contact with the adjacent edge of the door rim. When it is desired to remove the door for obtaining access to the interior of the casing, the latch is swung rearwardly into the position shown in dotted lines in Fig. 1 asshown in Fig. 2, which acts to again spread the split ring so that it may be readily disengaged from its sealing position in the recess 15. This frees the door rim from the casing so as to permit its ready removal with the lens carried thereby.

While the latch is shown herein with a pair of cam slots extending at an angle to each other, so as to exert a spreading force upon the ring when moved to open position, the intervening portion of the metal in the latch between said slots may be eliminated so that the movement to closed position will force the pins 22 together, as shown in Fig. 3, whereas When said latch is moved to open position the clamping ring will be permitted by the latch to spread or spring apart under its own spring tension.

The invention claimed is:

1. The combination with a lamp casing and a door closing rim adapted to be secured thereto, of means for removably securing said rim to said casing including a split clamping ring secured within said door rim and extending about the periphery of said casing intermediate said casing and door rim, projections on the split ends of said clamping ring extending through an open ingin said rim, and a pivotally mounted latch having a cam surface adapted to en gage said projecting ends for drawing them together when pivotally moved to one position and thereby clamp the door rim and easing together, and permit the expanding thereof when pivotally moved to the other position for permitting the ready removal of the rim from said casing.

2. The combination with a lamp casing having an annular depression formed thereabout adjacent the face thereof, and a door rim adapted to extend over said depression and spaced therefrom, of means for securing said rim to said casing including a split clamping ring mounted within said rim and adapted to engage about said casing within said recess, projecting ends secured to the split ends of said ring and extending through an opening in said rim, and a pivotally mounted finger engageable and tiltable cam type latch engaging said ends for drawing them together and causing said ring to clamp said rim upon said casing.

3. The combination with a lamp casing and a door closing rim adapted to be secured thereto, of a split clamping ring, projections on the split ends of said clamping ring, and a latch pivotally mounted on said projecting ends and provided with annularly disposed cam slots through which said ends extend whereby said ends will be moved towards or away from each other when said latch pivotally moved into opposite directions.

In witness whereof, I have hereunto ailixed my signature.

SAMUEL V. HYATT. 

